2563973 has 4 divisors (see below), whose sum is σ = 2567808. Its totient is φ = 2560140.

The previous prime is 2563969. The next prime is 2563997. The reversal of 2563973 is 3793652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2563973 - 2² = 2563969 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 5⁵ + 6⁷ + 3 + 9⁴ + 7² + 3¹¹ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623 + ... + 2348.

It is an arithmetic number, because the mean of its divisors is an integer number (641952).

2^2563973 is an apocalyptic number.

It is an amenable number.

2563973 is a deficient number, since it is larger than the sum of its proper divisors (3835).

2563973 is an equidigital number, since it uses as much as digits as its factorization.

2563973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3834.

The product of its digits is 34020, while the sum is 35.

The square root of 2563973 is about 1601.2410811617. The cubic root of 2563973 is about 136.8688072231.

The spelling of 2563973 in words is "two million, five hundred sixty-three thousand, nine hundred seventy-three".